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Message: <blockquote data-quote="pemerton" data-source="post: 8818043" data-attributes="member: 42582">This is obviously not true as it stands. You seem to be assuming that the traders have no market for their goods other than the residents of the Citadel, but given that it is a trade hub it seems obvious that that is not the case. The principal market for trade goods will be other traders, who then take the goods that they purchase to other markets where they sell them to their final consumers.Suppose that a given trader in the Citadel generates 50x of turnover on goods that cost them 30x for purchase and transport, and then pays 10x in tax (ie a 20% tax on the deemed sale value of the goods) and thus retains 10x profit. One way to pay that tax is by giving the city one fifth of their goods. If there are a large number of goods, that may be enough to support a reasonable number of people in the city.Increase the number of traders, and the population that is supported will grow. Change the posited figures, and we get different necessary ratios of goods sold to city population. As [USER=22779]@Hussar[/USER] posted, no D&D product goes into this sort of mathematical detail. It's enough that we can think up solutions in our imaginations.</blockquote>